I see in /usr/local/bin/sane*/backend there is a snapscan.c and a snapscan-usb.c file, but only snapscan gets built. Is there really a snapscan-usb or is that part of the patch I applied? Should I just get a newer version of Sane?

When I boot my system it says "USB scanner has claimed interface xxx" along with "USB scanner, Manufacturer Color" and "USB scanner, Product ID: FlatbedScanner 13", or words to that effect. However, scanimage -L and scanimage -T seem to lock the USB bus for a long time.